Blar i NTNU Open på forfatter "Bittner, Michael"
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A comprehensive study on improved power materials for high-temperature thermoelectric generators
Bittner, Michael; Kanas, Nikola; Hinterding, Richard; Steinbach, Frank; Räthel, Jan; Schrade, Mattias; Wiik, Kjell; Einarsrud, Mari-Ann; Feldhoff, Armin (Journal article; Peer reviewed, 2019)Dense Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO-NCO-BCCO) nanocomposites were produced from sol-gel derived Ca2.25Na0.3Bi0.35Tb0.1Co4O9 powder by four methods: Hot-pressing (HP), spark plasma sintering (SPS) and pressureless ... -
All-oxide thermoelectric module with in situ formed non-rectifying complex p-p-n junction and transverse thermoelectric effect
Kanas, Nikola; Bittner, Michael; Desissa, Temesgen Debelo; Singh, Sathya Prakash; Norby, Truls Eivind; Feldhoff, Armin; Grande, Tor; Wiik, Kjell; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)All-oxide thermoelectric modules for energy harvesting are attractive due to high temperature stability, low cost, and the potential to use non-scarce and non-toxic elements. Thermoelectric modules are mostly fabricated ... -
Hydroxyl airglow observations for investigating atmospheric dynamics: Results and challenges
Wüst, Sabine; Bittner, Michael; Espy, Patrick Joseph; French, W. John R.; Mulligan, Frank J. (Peer reviewed; Journal article, 2023)Measurements of hydroxyl (OH*) airglow intensity are a straightforward and cost-efficient method which allows the derivation of information about the climate and dynamics of the upper mesosphere/lower thermosphere (UMLT) ... -
Influence of processing on stability, microstructure and thermoelectric properties of Ca3Co4-xO9+δ
Kanas, Nikola; Singh, Sathya Prakash; Rotan, Magnus; saleemi, Mohsin; Bittner, Michael; Feldhoff, Armin; Norby, Truls Eivind; Wiik, Kjell; Grande, Tor (Journal article; Peer reviewed, 2018)Due to high figure of merit, Ca3Co4-xO9+δ (CCO) has potential as p-type material for high-temperature thermoelectrics. Here, the influence of processing including solid state sintering, spark plasma sintering and ... -
Traveling planetary wave activity from mesopause region airglow temperatures determined by the Network for the Detection of Mesospheric Change (NDMC)
Reisin, Esteban R.; Scheer, Jürgen; Dyrland, Margit Elisabet; Sigernes, Fred; Deehr, Charles Sterling; Schmidt, Carsten H.; Höppner, Kathrin; Bittner, Michael; Ammosov, Petr P.; Gavrilyeva, Galina A.; Stegman, Jacek; Perminov, Vladimir I.; Semenov, Anatoly I.; Knieling, Peter; Koppmann, Ralf; Shiokawa, Kazuo; Lowe, Robert P.; López-González, Maria J.; Rodriguez, Eloy; Zhao, Yucheng; Taylor, Michael John; Buriti, Ricardo Arlen; Espy, Patrick Joseph; French, W. John R.; Eichmann, Kai Uwe; Burrows, John Philip; von Savigny, Christian H.P. (Journal article; Peer reviewed, 2014)The global distribution of traveling planetary wave (PW) activity in the mesopause region is estimated for the first time from ground-based airglow measurements. Monthly and total mean climatologies of PW power are determined ... -
Triple-phase ceramic 2D nanocomposite with enhanced thermoelectric properties
Bittner, Michael; Kanas, Nikola; Hinterding, Richard; Steinbach, Frank; Groeneveld, Dennis; Wemhoff, Piotr; Wiik, Kjell; Einarsrud, Mari-Ann; Feldhoff, Armin (Journal article; Peer reviewed, 2019)A thermoelectric triple-phase p-type Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO–NCO–BCCO) 2D nanocomposite was obtained from pressureless sintering in air. The anisotropic thermoelectric properties of the nanocomposite exhibit a ...